Cypress Perform

Home > Design Support > Cypress Developer CommunityTM > Cypress Forums > USB Controllers > Change USB descriptor-contents after firmware-compilation

Bookmark and Share
Cypress Developer CommunityTM
Forums | Videos | Blogs | Training | Rewards Program | Community Components



Change USB descriptor-contents after firmware-compilation
Moderator:
RSKV

Post Reply
Follow this topic



Change USB descriptor-contents after firmware-compilation

RobK posted on 24 Jul 2012 5:56 AM PST
Top Contributor
56 Forum Posts

Hi all,

does anybody know a way how can I change the contents of USB-descriptors after compilation in the .img-binary?

Can I determine the location of the descriptors in the .img-file by some linker-commands or something like that?

 

Thanks!

Re: Change USB descriptor-contents after firmware-compilation

Chris R. posted on 24 Jul 2012 12:38 PM PST
Top Contributor
135 Forum Posts

Do you want to change the serial number string with a batch file? In the iic files of the FX2 I did this simply by search and replace by a small c program. I think this is also possible with the img file. I tested this with an older SDK and the firmware was correctly downloaded and executed even if I did not adjust the checksum.

Re: Change USB descriptor-contents after firmware-compilation

RobK posted on 25 Jul 2012 11:31 PM PST
Top Contributor
56 Forum Posts

Hi Chris R.,

ok, that would be the rather 'dirty' variant.

But I have to change not only the serial number - descriptor but also a device-version or even a user-changeable descriptor where i don't know the previous content so wouldn't know for what I have to search.

 

Regards,

Robert



ALL CONTENT AND MATERIALS ON THIS SITE ARE PROVIDED "AS IS". CYPRESS SEMICONDUCTOR AND ITS RESPECTIVE SUPPLIERS MAKE NO REPRESENTATIONS ABOUT THE SUITABILITY OF THESE MATERIALS FOR ANY PURPOSE AND DISCLAIM ALL WARRANTIES AND CONDITIONS WITH REGARD TO THESE MATERIALS, INCLUDING BUT NOT LIMITED TO, ALL IMPLIED WARRANTIES AND CONDITIONS OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE, TITLE AND NON-INFRINGEMENT OF ANY THIRD PARTY INTELLECTUAL PROPERTY RIGHT. NO LICENSE, EITHER EXPRESS OR IMPLIED, BY ESTOPPEL OR OTHERWISE, IS GRANTED BY CYPRESS SEMICONDUCTOR. USE OF THE INFORMATION ON THIS SITE MAY REQUIRE A LICENSE FROM A THIRD PARTY, OR A LICENSE FROM CYPRESS SEMICONDUCTOR.

Content on this site may contain or be subject to specific guidelines or limitations on use. All postings and use of the content on this site are subject to the Terms and Conditions of the site; third parties using this content agree to abide by any limitations or guidelines and to comply with the Terms and Conditions of this site. Cypress Semiconductor and its suppliers reserve the right to make corrections, deletions, modifications, enhancements, improvements and other changes to the content and materials, its products, programs and services at any time or to move or discontinue any content, products, programs, or services without notice.